Blockchain Consensus Method and System Based on Trusted Execution Environment and Directed Acyclic Graph

Abstract

The invention discloses a block chain consensus method and system based on a trusted execution environment and a directed acyclic graph. The steps of the invention include receiving event sets sent by neighbor nodes, and judging events based on trusted execution environment information carried by new events Whether it is legal or not, add the set of legal events to the directed acyclic graph of this node. If any event is agreed by more than a specified number of nodes in the blockchain system, it will be determined that the event has reached a consensus and the current round of consensus will end; all The node packages the generated transaction into the generated new event, randomly selects a neighbor node, and sends the set of events that the node knows and the neighbor node does not know to the neighbor node through gossip messages. The present invention can effectively reduce network communication overhead, simplify the process of reaching consensus, improve the efficiency of reaching consensus, improve the scalability and throughput of nodes, and reduce the resource consumption of event storage.

Description

technical field [0001] The present invention relates to a block chain consensus technology, in particular to a block chain consensus method and system based on a trusted execution environment and a directed acyclic graph. Background technique [0002] Blockchain consensus is one of the core technologies of the blockchain, which is used by each consensus subject of the blockchain to reach a consensus on the transaction data on the blockchain, and finally form a distributed and consistent ledger. According to the blockchain data structure, the existing blockchain consensus methods can be divided into two methods: consensus based on blockchain structure and consensus based on directed acyclic graph (DAG). 1. Consensus methods based on blockchain structure include Proof of Work (PoW), Proof of Stake (PoS), Practical Byzantine (PBFT), etc. Among them, PoW has problems such as low scalability, low throughput, and large resource consumption. PoS is an improvement method of PoW. Al...

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Problems solved by technology

Among them, PoW has problems such as low scalability, low throughput, and large resource consumption. PoS is an improvement method of PoW. Although PoS improves certain efficiency and reduces resource consumption, there is a risk of centralization

The PBFT consensus method requires a large network communication overhead, which is not conducive to the expansion of its consensus subject

2. DAG-based blockchain consensus methods such as byteball, hashgraph, etc., although the throughput and scalability have been improved to a certain extent, the consensus subject cannot be changed dynamically, and The consensus process is complex

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